3
Introduction  Arthritis is a disease that affects the joints and surrounding tissues to cause pain, stiffness and inflammation.  The most common is osteoarthritis where the cartilage breaks down and the bones rub together. The joint then loses its shape and alignment.  Materials that are used in hip joint implant including  Titanium alloy, Stainless steel, Co -Cr  There are failure issues reported by clinical side are corrosion products.  Metal Ions as a result of fretting wear  Patients have corrosive product around the joint and Ion in the blood

9
Conclusion  The aim of this project is to design and manufacture of a fretting corrosion set-up for hip Implant  Investigating failure in the hip implant  Result of Ions in the blood and find solutions  Patient have corrosion product around the joint  Design modification if necessary